Improvement of the photostabilization of PMMA films in the presence 2N-salicylidene-5-(substituted)-1,3,4-thiadiazole

Emad Yousif, Jumat Salimon, Nadia Salih, Ahmed Ahmed

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The photostabilization of poly(methy methacrylate) (PMMA) films by 2N-salicylidene-5-(substituted)-1,3,4-thiadiazole compounds was investigated. The PMMA films containing concentration of complexes 0.5% by weight were produced by the casting method from chloroform solvent. The photostabilization activities of these compounds were determined by monitoring the hydroxyl index with irradiation time. The changes in viscosity average molecular weight of PMMA with irradiation time were also tracked (using benzene as a solvent). The quantum yield of the chain scission (Φ cs) of these complexes in PMMA films was evaluated and found to range between 8.74×10 -5 and 4.65×10 -5. Results obtained showed that the rate of photostabilization of PMMA in the presence of the additive followed the trend:SN. >. SC. >. SB. >. SI. >. SP. According to the experimental results obtained, several mechanisms were suggested depending on the structure of the additive. Among them, UV absorption, peroxide decomposer and radical scavenger for photostabilizer mechanisms were suggested.

Original languageEnglish
Pages (from-to)131-137
Number of pages7
JournalJournal of King Saud University - Science
Volume24
Issue number2
DOIs
Publication statusPublished - Apr 2012

Fingerprint

Methacrylates
Irradiation
Peroxides
Quantum yield
Chloroform
Benzene
Hydroxyl Radical
Casting
Molecular weight
1,3,4-thiadiazole
Viscosity
Monitoring

Keywords

  • Photochemistry
  • Photostabilizer
  • PMMA
  • Schiff base
  • UV absorber,1,3,4-thiadiazole
  • UV-Vis spectroscopy

ASJC Scopus subject areas

  • General

Cite this

Improvement of the photostabilization of PMMA films in the presence 2N-salicylidene-5-(substituted)-1,3,4-thiadiazole. / Yousif, Emad; Salimon, Jumat; Salih, Nadia; Ahmed, Ahmed.

In: Journal of King Saud University - Science, Vol. 24, No. 2, 04.2012, p. 131-137.

Research output: Contribution to journalArticle

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